The American College of Allergy, Asthma, and Immunology invites you to submit a late-breaking abstract to be considered for oral presentation during the ACAAI 2026 Annual Scientific Meeting, November 12 - 16, 2026, in Phoenix, AZ.
Late-Breaking abstracts must include innovative research results that were not available by the regular abstract deadline. Due to the nature of these abstracts, there will be a VERY LIMITED number of abstracts accepted. These abstracts must contain primary data from groundbreaking laboratory studies or from novel or large clinical trials.
Late breaking abstracts will be accepted between September 1 and October 6, 2026 - 5:00 pm (CT).
No requests for extensions will be honored.
View late-breaking abstract submission guidance here.
Important: In-Person Presentation
All abstracts accepted for oral or ePoster presentation at the ACAAI 2026 Annual Meeting must be presented in-person. There is no option to present virtually. Presenting Authors must register for in-person attendance at the ACAAI 2026 Annual Meeting. Presenting Authors who are unable to register for in-person Annual Meeting attendance and travel to Phoenix to present their abstract will have the opportunity to designate a co-Author to serve as the Presenting Author. If no co-Authors are available to present, the abstract must be withdrawn by the submission deadline date. Failure to deliver an in-person presentation for oral and poster abstracts may result in the loss of future abstract submission and authorship privileges.
Visit the Abstracts FAQ page for answers to frequently asked questions.